@article{1103043665, author = {Erd\H os, Paul and Shapiro, Harold N.}, title = {On the least primitive root of a prime.}, journal = {Pacific J. Math.}, volume = {7}, number = {4}, year = {1957}, pages = { 861-865}, language = {en}, url = {http://dml.mathdoc.fr/item/1103043665} }
Erdős, Paul; Shapiro, Harold N. On the least primitive root of a prime.. Pacific J. Math., Tome 7 (1957) no. 4, pp. 861-865. http://gdmltest.u-ga.fr/item/1103043665/